I think you might start using a prong/slip collar with a jerk and firm, "NO!" first, then maybe progress. The behavior has to be corrected soon for both of your safety.
Mine was chasing/herding cows where I guide flyfishers and that was not an option. I used an ecollar and in short order, and now two years later, she still ignores them. It works; and I started just after she was six months.
Eva Chelsea von Selah GSD - 3/11/08
Chelsea Girl GSD/Chow - went 15 yrs, 8 months; waiting patiently for me at the Bridge
Last edited by Eva von Selah; 12-02-2010 at 08:57 PM.